92 OENERA OF UYMENUITEKA. 



/ 



Surface of the third «!(rmont just above the snout-like projection ]ir(Mluced 

 into a cone Mha|>e<l piece forniiuK tlie direct upex of a fold which 

 extends on each side just alwive the apical and lateral margins. 



OiplorrhoH Aaron. 

 Emargination or notch of the apex closed, or partly filled up by a membrane, 



which is excised beneath NotozUN Forst. 



A|iical niarKin of the third abdominal sejtment entire or broadly sinuate. 



Holopyga Dahlb. 

 Tarsal claw with one small perpendicular tooth in the middle. 



Hedyehridium Perrin. 

 Tarsal claws bifid at the apex, without inner teeth tiedychruui Latr. 



Subfamily Chryhidin.e. 



Head as broad, or broader than the postscutelluni ; space between the eyes on the 

 face as wide as the distance between the base of antenna? and the vertex ; the 

 CArina transverse, not forming a basin ()n the vertex ; po8ts<'u'^ellum rounded 

 posteriorly; first abdominal segment rounde<l, not carinattd on the sides; 

 second sesment about twice as lonjt on the dorsum as on the sides, its poste- 

 ri(n- marjjin alxjut stniight in the middle, convex laterally.. Chrysis Linn. 



Hea^l .small, much narrower than the postscutelluni; space between the eyes, on 

 the face, narrow, not half as wide as the distance between the bast; of an- 

 tenna? and the vertex ; the curina extended upward, surrounding the ante- 

 rior ocellus, forming the margins of a distinct basin, much in sha)>e of a 

 horse-shoe; j)o.st.scutellum partly hidden, projecting into a subconical piece, 

 which is strongly excavated ; first abdominal segment fiattened on the sides, 

 ciiusing a short, oblique carina above ; second segment more than three times 

 as long on the dorsum as on the sides, its |>osterior margin equally and very 

 convex Stilbum Spin. 



Siil)t'aniily Pa rnopin.e. 



Comitrising a single genus whose characters are tho.se of the subfamily, and at 

 once recognized by the lengtheried bee-like proboscis Parnopes Fabr. 



HETEROGYNA. 



Thi.s series is composed of a large number of insects familiarly 

 known as Ants (but not including the " white ants," or Termites, 

 which belong to the Neuroj)tera), " and which are known by their 

 habit of residing in more or less numerou.s societies under ground ; 

 whence arises the necessity for a great number of individuals (workers 

 or neuters) having the sexual organs and instincts rendered abortive, 

 whereby, being freed from the latter, they are the better fitted to 

 |)erform the labors of the community, for which purpose they are 

 moreover destitute of wings ; whilst the male.s and females are much 



